參數(shù)資料
型號(hào)： T8301
英文描述： T8301 Internet Protocol Telephone Phone-On-A-Chip⑩ IP Solution DSP
中文描述： T8301因特網(wǎng)協(xié)議電話熱線電話在一個(gè)芯片⑩DSP的IP解決方案
文件頁(yè)數(shù)： 54/190頁(yè)
文件大?。?/td> 1535K
代理商： T8301
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)第17頁(yè)第18頁(yè)第19頁(yè)第20頁(yè)第21頁(yè)第22頁(yè)第23頁(yè)第24頁(yè)第25頁(yè)第26頁(yè)第27頁(yè)第28頁(yè)第29頁(yè)第30頁(yè)第31頁(yè)第32頁(yè)第33頁(yè)第34頁(yè)第35頁(yè)第36頁(yè)第37頁(yè)第38頁(yè)第39頁(yè)第40頁(yè)第41頁(yè)第42頁(yè)第43頁(yè)第44頁(yè)第45頁(yè)第46頁(yè)第47頁(yè)第48頁(yè)第49頁(yè)第50頁(yè)第51頁(yè)第52頁(yè)第53頁(yè)當(dāng)前第54頁(yè)第55頁(yè)第56頁(yè)第57頁(yè)第58頁(yè)第59頁(yè)第60頁(yè)第61頁(yè)第62頁(yè)第63頁(yè)第64頁(yè)第65頁(yè)第66頁(yè)第67頁(yè)第68頁(yè)第69頁(yè)第70頁(yè)第71頁(yè)第72頁(yè)第73頁(yè)第74頁(yè)第75頁(yè)第76頁(yè)第77頁(yè)第78頁(yè)第79頁(yè)第80頁(yè)第81頁(yè)第82頁(yè)第83頁(yè)第84頁(yè)第85頁(yè)第86頁(yè)第87頁(yè)第88頁(yè)第89頁(yè)第90頁(yè)第91頁(yè)第92頁(yè)第93頁(yè)第94頁(yè)第95頁(yè)第96頁(yè)第97頁(yè)第98頁(yè)第99頁(yè)第100頁(yè)第101頁(yè)第102頁(yè)第103頁(yè)第104頁(yè)第105頁(yè)第106頁(yè)第107頁(yè)第108頁(yè)第109頁(yè)第110頁(yè)第111頁(yè)第112頁(yè)第113頁(yè)第114頁(yè)第115頁(yè)第116頁(yè)第117頁(yè)第118頁(yè)第119頁(yè)第120頁(yè)第121頁(yè)第122頁(yè)第123頁(yè)第124頁(yè)第125頁(yè)第126頁(yè)第127頁(yè)第128頁(yè)第129頁(yè)第130頁(yè)第131頁(yè)第132頁(yè)第133頁(yè)第134頁(yè)第135頁(yè)第136頁(yè)第137頁(yè)第138頁(yè)第139頁(yè)第140頁(yè)第141頁(yè)第142頁(yè)第143頁(yè)第144頁(yè)第145頁(yè)第146頁(yè)第147頁(yè)第148頁(yè)第149頁(yè)第150頁(yè)第151頁(yè)第152頁(yè)第153頁(yè)第154頁(yè)第155頁(yè)第156頁(yè)第157頁(yè)第158頁(yè)第159頁(yè)第160頁(yè)第161頁(yè)第162頁(yè)第163頁(yè)第164頁(yè)第165頁(yè)第166頁(yè)第167頁(yè)第168頁(yè)第169頁(yè)第170頁(yè)第171頁(yè)第172頁(yè)第173頁(yè)第174頁(yè)第175頁(yè)第176頁(yè)第177頁(yè)第178頁(yè)第179頁(yè)第180頁(yè)第181頁(yè)第182頁(yè)第183頁(yè)第184頁(yè)第185頁(yè)第186頁(yè)第187頁(yè)第188頁(yè)第189頁(yè)第190頁(yè)
Data Sheet
March 2000
DSP1627 Digital Signal Processor
18
Lucent Technologies Inc.
4 Hardware Architecture
(continued)
Data Memory Mapping
On the data memory side (see Table 6), the six 1K
banks of dual-port RAM are located starting at address
0. Addresses from 0x4000 to 0x40FF reference a 256-
word memory-mapped I/O segment (IO). Addresses
from 0x4100 to 0x7FFF reference the low external data
RAM segment (ERAMLO). Addresses above 0x8000
reference high external data RAM (ERAMHI).
Wait-States
The number of wait-states (from 0 to 15) used when ac-
cessing each of the four external memory segments
(ERAMLO, IO, ERAMHI, and EROM) is programmable
in the mwait register (see Table 36). When the program
references memory in one of the four external seg-
ments, the internal multiplexer is automatically switched
to the appropriate set of internal buses, and the associ-
ated external enable of ERAMLO, IO, ERAMHI, or
EROM is issued. The external memory cycle is auto-
matically stretched by the number of wait-states config-
ured in the appropriate field of the mwait register.
4.5 External Memory Interface (EMI)
The external memory interface supports read/write op-
erations from instruction/coefficient memory, data
memory, and memory-mapped I/O devices. The
DSP1627 provides a 16-bit external address bus,
AB[15:0], and a 16-bit external data bus, DB[15:0].
These buses are multiplexed between the internal bus-
es for the instruction/coefficient memory and the data
memory. Four external memory segment enables,
ERAMLO, IO, ERAMHI, and EROM, select the external
memory segment to be addressed.
If a data memory location with an address between
0x4100 and 0x7FFF is addressed, ERAMLO is asserted
low.
If one of the 256 external data memory locations, with
an address greater than or equal to 0x4000, and less
than or equal to 0x40FF, is addressed, IO is asserted
low. IO is intended for memory-mapped I/O.
If a data memory location with an address greater than
or equal to 0x8000 is addressed, ERAMHI is asserted
low. When the external instruction/coefficient memory is
addressed, EROM is asserted low.
The flexibility provided by the programmable options of
the external memory interface (see Table 36, mwait
Register and Table 38, ioc Register) allows the
DSP1627 to interface gluelessly with a variety of com-
mercial memory chips.
Each of the four external memory segments, ERAMLO,
IO, ERAMHI, and EROM, has a number of wait-states
that is programmable (from 0 to 15) by writing to the
mwait register. When the program references memory
in one of the four external segments, the internal multi-
plexer is automatically switched to the appropriate set of
internal buses, and the associated external enable of
ERAMLO, IO, ERAMHI, or EROM is issued. The exter-
nal memory cycle is automatically stretched by the num-
ber of wait-states in the appropriate field of the mwait
register.
When writing to external memory, the RWN pin goes
low for the external cycle. The external data bus,
DB[15:0], is driven by the DSP1627 starting halfway
through the cycle. The data driven on the external data
bus is automatically held after the cycle unless an exter-
nal read cycle immediately follows.
The DSP1627 has one external address bus and one
external data bus for both memory spaces. Since some
instructions provide the capability of simultaneous ac-
cess to both X space and Y space, some provision must
be made to avoid collisions for external accesses. The
DSP1627 has a sequencer that does the external X ac-
cess first, and then the external Y access, transparently
to the programmer. Wait-states are maintained as
Table 6. Data Memory Map (Not to Scale)
Decimal
Address
0
Address in
r0, r1, r2, r3
0x0000
Segment
DPRAM[1:6]
6K
0x1800
Reserved
(10K)
16K
0x4000
IO
16,640
0x4100
ERAMLO
32K
0x8000
ERAMHI
64K – 1
0xFFFF
相關(guān)PDF資料
PDF描述
T8302 T8302 Internet Protocol Telephone Advanced RISC Machine (ARM) Ethernet QoS Using IEEE 802.1q
T8502 T8502 and T8503 Dual PCM Codecs with Filters
T8503 T8502 and T8503 Dual PCM Codecs with Filters
T8531A T8531A/8532 Multichannel Programmable Codec Chip Set
T8531 T8502 and T8503 Dual PCM Codecs with Filters
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
T8301AX 制造商:MOLEX 制造商全稱:Molex Electronics Ltd. 功能描述:Terminator Die
T8301BX 制造商:MOLEX 制造商全稱:Molex Electronics Ltd. 功能描述:Terminator Die
T8301DX 制造商:MOLEX 制造商全稱:Molex Electronics Ltd. 功能描述:Terminator Die
T8302 制造商:AGERE 制造商全稱:AGERE 功能描述:T8302 Internet Protocol Telephone Advanced RISC Machine (ARM) Ethernet QoS Using IEEE 802.1q
T8302A 制造商:MOLEX 制造商全稱:Molex Electronics Ltd. 功能描述:Terminator Die
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*